Genset

Abstract

A genset including at least one generator for generating electrical energy, which can be driven by a drive device is provided. Also provided is a detection device for detection of the presence of a grid fault in at least one phase of the power grid, a device for determining an operating state of the generator immediately before or upon detection of a grid fault, and a regulating device, to which the signals of the detection device and the device for determining an operating state of the generator can be fed. The regulating device is designed upon detection of a grid fault to reduce the power of the drive device in dependence of that operating state of the generator, which has been determined immediately before or upon detection of the grid fault.

What we claim is: 
     
       1. A genset with at least one generator for generating electrical energy, driven by a drive device, comprising:
 a detection device for detecting a presence of a grid fault in at least one phase of a power grid; 
 a device for determining an operating state of the at least one generator immediately before or upon detection of the grid fault; 
 a regulating device to which signals from the detection device and the device for determining the operating state can be fed, wherein the regulating device is designed to regulate power of the drive device upon detection of the grid fault, in dependence on a specific operating state of the at least one generator determined by the device for determining the operating state, which occurred immediately before or during detection of the grid fault; and 
 a load angle device for calculating a current load angle of the at least one generator, whose signals can be fed to the regulating device, wherein the regulating device is designed to maintain and reinforce measures to reduce power of the drive device upon reaching or exceeding a predetermined threshold value by using a Moment of inertia of the genset and the load angle and to terminate or reduce measures to reduce power of the drive device upon falling below the predetermined threshold value. 
 
     
     
       2. The genset according to  claim 1 , wherein the detection device comprises a measuring device for measuring at least one grid voltage and/or a grid current of the at least one phase of the power grid connected to the genset, wherein the detection device reports the presence of the grid fault when measuring an undervoltage and/or an overcurrent in the at least one phase of the power grid. 
     
     
       3. The genset according to  claim 1 , wherein the device for determining the operating state of the generator comprises:
 a measuring device for measuring a voltage and/or a current of the at least one generator; and/or 
 a measuring device for measuring the power of the at least one generator; and/or 
 a measuring device for measuring a power factor of the at least one generator. 
 
     
     
       4. The genset according to  claim 3 , wherein the regulating device upon reaching or passing predetermined threshold values for
 the power of the at least one generator, 
 the voltage and/or current of the power grid, and 
 the power factor, 
 reduces the power of the drive device. 
 
     
     
       5. The genset according to  claim 1 , wherein the regulating device is designed to reduce power of the drive device by
 an at least partial switch off or retarding of an ignition device of at least one combustion chamber, and/or deactivating or reducing a fuel supply of the at least one combustion chamber of the drive device. 
 
     
     
       6. The genset according to  claim 1 , wherein the regulating device is designed to reduce power of the drive device for a predetermined period of time. 
     
     
       7. The genset according to  claim 6 , wherein the regulating device is designed to reduce for the predetermined period of time the power of the drive device, in dependence of the operating state of the at least one generator immediately before or upon detection of the grid fault. 
     
     
       8. The genset according to  claim 1 , wherein the drive device is an internal combustion engine, a reciprocating piston engine, or a gas turbine. 
     
     
       9. A method for regulating a genset comprising at least one generator for generating electrical energy, driven by a drive device, the method comprising:
 detecting a presence of a grid fault in at least one phase of a power grid; 
 determining an operating state of the at least one generator immediately before or upon detection of the grid fault; and 
 upon detection or presence of the grid fault, regulating a power of the drive device based on a specific operating state of the at least one generator which occurred immediately before or on detection of the grid fault, wherein regulating the power comprises using a load angle device for calculating a current load angle of the at least one generator, whose signals can be fed to a regulating device, wherein the regulating device is designed to maintain and reinforce measures to reduce power of the drive device upon reaching or exceeding a predetermined threshold value by using a Moment of inertia of the genset and the load angle and to terminate or reduce measures to reduce power of the drive device upon falling below the predetermined threshold value. 
 
     
     
       10. The method of  claim 9 , wherein detecting the presence of the grid fault comprises using a detection device comprising a measuring device for measuring at least one grid voltage and/or a grid current of the at least one phase of the power grid connected to the genset, wherein the detection device reports the presence of the grid fault when measuring an undervoltage and/or an overcurrent in the at least one phase of the power grid. 
     
     
       11. The method of  claim 9 , wherein determining the operating state of the at least one generator comprises using a device that comprises:
 a measuring device for measuring a voltage and/or a current of the at least one generator; and/or 
 a measuring device for measuring the power of the at least one generator; and/or 
 a measuring device for measuring a power factor of the at least one generator. 
 
     
     
       12. The method of  claim 10 , wherein regulating the power of the drive device comprises using the regulating device upon reaching or passing predetermined threshold values for:
 the power of the at least one generator, 
 the voltage and/or current of the power grid, and 
 the power factor, 
 and reducing, via the regulating device, the power of the drive device. 
 
     
     
       13. The method of  claim 12 , wherein the regulating device is designed to reduce power of the drive device by
 an at least partial switch off or retarding of an ignition device of at least one combustion chamber, and/or 
 deactivating or reducing a fuel supply of the at least one combustion chamber of the drive device. 
 
     
     
       14. The method of  claim 12 , wherein the regulating device is designed to reduce for the predetermined period of time the power of the drive device, in dependence of the operating state of the at least one generator immediately before or upon detection of the grid fault. 
     
     
       15. A system, comprising:
 a detection device for detecting a presence of a grid fault in at least one phase of a power grid, wherein the power grid is powered via a genset with at least one generator for generating electrical energy, driven by a drive device; 
 a device for determining an operating state of the at least one generator immediately before or upon detection of the grid fault; 
 a regulating device to which signals from the detection device and the device for determining the operating state can be fed, wherein the regulating device is designed to regulate power of the drive device upon detection of the grid fault, in dependence on a specific operating state of the at least one generator determined by the device for determining the operating state, which occurred immediately before or during detection of the grid fault; and 
 a load angle device for calculating a current load angle of the at least one generator, whose signals can be fed to the regulating device, wherein the regulating device is designed to maintain and reinforce measures to reduce power of the drive device upon reaching or exceeding a predetermined threshold value by using a Moment of inertia of the genset and the load angle and to terminate or reduce measures to reduce power of the drive device upon falling below the predetermined threshold value. 
 
     
     
       16. The system of  claim 15 , wherein the detection device comprises a measuring device for measuring at least one grid voltage and/or a grid current of the at least one phase of the power grid connected to the genset, wherein the detection device reports the presence of the grid fault when measuring an undervoltage and/or an overcurrent in the at least one phase of the power grid. 
     
     
       17. The system of  claim 15 , wherein the device for determining the operating state of the generator comprises:
 a measuring device for measuring a voltage and/or a current of the at least one generator; and/or 
 a measuring device for measuring the power of the at least one generator; and/or 
 a measuring device for measuring a power factor of the at least one generator. 
 
     
     
       18. The system of  claim 15 , wherein the regulating device upon reaching or passing predetermined threshold values for
 the power of the at least one generator, 
 the voltage and/or current of the power grid, and 
 the power factor, 
 reduces the power of the drive device. 
 
     
     
       19. The system of  claim 15 , wherein the regulating device is designed to reduce power of the drive device by
 an at least partial switch off or retarding of an ignition device of at least one combustion chamber, and/or 
 deactivating or reducing a fuel supply of the at least one combustion chamber of the drive device.